Unable to install SSL certificate on Bluehost
You are trying to install the SSL certificate on a temporary Bluehost domain. Here's an example of how a temporary domain looks - http://box5568.temp.domains/~sslzen
SSL certificates can only be installed on your own domain name such sslzen.com or www.sslzen.com
Please follow these instructions to replace your temporary domain name with your own domain name.
Video Tutorial - https://www.youtube.com/watch?v=E2I_8C5vMf4
Article - https://www.bluehost.com/help/article/using-your-temporary-url-with-wordpress#changing-from-temp